双曲抛物面空间索网的平拉式人行悬索桥探讨  

Discussion on the Flat-pull Pedestrian Suspension Bridge with Hyperbolic Parabo-loid Shaped Spatial Cable Network

作　　者：姜涛[1] 李今保[1] 宋守坛[2] Jiang Tao;Li JinBao;Song ShouTan(Jiangsu Southeast Special Technical Engineering Co.,Ltd.,Nanjing 210008,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]江苏东南特种技术工程有限公司,南京210008 [2]东南大学土木工程学院,南京211189

出　　处：《特种结构》2022年第3期47-51,共5页Special Structures

摘　　要：为了提高平拉式人行悬索桥的侧向刚度,利用双曲抛物面的直纹特性,本文提出一种双曲抛物面空间缆索网的平拉式人行悬索桥结构体系。在双肢柱桥塔的抛物线凹型盖梁之上悬挂双曲抛物面空间缆索网,管桁架结构形式的桥面结构搁置在双曲抛物面空间缆索网体系的凹槽之中。结合某峡谷河流120m跨径人行景观悬索桥,进行工程参数设计,建立Midas有限元分析模型,进行内力分析计算,开展动力模态分析研究。研究表明:双曲抛物面空间交叉缆索网提供水平分力,提高了抗侧刚度和抗扭刚度,双曲抛物面空间缆索网的平拉式人行悬索桥具有良好的抗风稳定性。In this paper,using the ruled surface characteristics of the hyperbolic paraboloid,a flat-pull pe-destrian suspension bridge structural system with a hyperbolic paraboloid shaped spatial cable network is pro-posed to improve the lateral stiffness of the bridge.The hyperbolic paraboloid shaped space cable network was suspended on the parabolic concave bent cap of the double-leg column bridge tower,and the bridge deck struc-ture in the form of tube truss was placed in the groove of the hyperbolic paraboloid space cable network system.In this study,a 120m span pedestrian landscape suspension bridge over a canyon River was taking as an exam-ple.The engineering parameters were designed,a finite element analysis Midas model was established,the stress was calculated,and the dynamic modal analysis was carried out.The research shows that the hyperbolic paraboloid spatial-crossing cable network provides horizontal force and thus improves the lateral stiffness and tor-sional stiffness.The flat-pull pedestrian suspension bridge with hyperbolic paraboloid shaped space cable net-work has good wind stability.

关 键 词：人行景观桥 平拉式悬索桥 空间缆索网 双曲抛物面 侧向刚度 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]